VDB-207383 · CVE-2021-35939 · GCVE-0-2021-35939

RPM link following

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.1	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in RPM. Affected by this vulnerability is an unknown functionality. The manipulation leads to link following. This vulnerability is listed as CVE-2021-35939. The attack may be initiated remotely. There is no available exploit. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in RPM (affected version unknown) and classified as critical. This issue affects an unknown functionality. The manipulation with an unknown input leads to a link following vulnerability. Using CWE to declare the problem leads to CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

It was found that the fix for CVE-2017-7500 and CVE-2017-7501 was incomplete: the check was only implemented for the parent directory of the file to be created. A local unprivileged user who owns another ancestor directory could potentially use this flaw to gain root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

The weakness was presented 08/26/2022. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2021-35939 since 06/29/2021. The technical details are unknown and an exploit is not publicly available.

Applying the patch 96ec957e281220f8e137a2d5eb23b83a6377d556 is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Name

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 8.1

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 96ec957e281220f8e137a2d5eb23b83a6377d556

Timelineinfo

06/29/2021 🔍
08/26/2022 +423 days 🔍
08/26/2022 +0 days 🔍
10/02/2022 +37 days 🔍

Sourcesinfo

Advisory: 96ec957e281220f8e137a2d5eb23b83a6377d556
Status: Confirmed

CVE: CVE-2021-35939 (🔍)
GCVE (CVE): GCVE-0-2021-35939
GCVE (VulDB): GCVE-100-207383

Entryinfo

Created: 08/26/2022 20:38
Updated: 10/02/2022 12:09
Changes: 08/26/2022 20:38 (38), 10/02/2022 12:02 (1), 10/02/2022 12:09 (11)
Complete: 🔍
Cache ID: 216::103